To set a static IP, you'll need to have the following superpowers: the IP address, subnet mask, gateway, and DNS servers. Don't worry if these sound like alien languages, we'll break them down in a sec. Your ISP or network admin should be able to provide you with these magical numbers.
The IP address is like your unique phone number on the network, and the subnet mask helps determine which neighborhood you're in. The gateway is like the main entrance to the internet, and the DNS servers are like the phonebook that helps you find websites. Got it?